Camera optical lens

ABSTRACT

The present invention relates to the field of optical lenses, and provides a camera optical lens, including, from an object side to an image side, a first lens having a positive refractive power, a second lens a negative refractive power, a third lens having a positive refractive power, a fourth lens having a negative refractive power, and a fifth lens. At least one of the first lens to the fifth lens has a free-form surface, and the camera optical lens satisfies: 0≤R7; and R10≤0, where R7 denotes a central curvature radius of an object side surface of the fourth lens, and R10 denotes a central curvature radius of an image side surface of the fifth lens. The camera optical lens provided by the present invention satisfies design requirements of a long focal length and ultra-thinness while having excellent optical performance.

TECHNICAL FIELD

The present invention relates to the field of optical lenses, and more particularly, to a camera optical lens suitable for portable terminal devices such as smart phones and digital cameras, and for imaging devices such as monitors and PC lenses.

BACKGROUND

With the development of camera lenses, higher and higher requirements are put forward for imaging quality of the lenses. The “night scene photography” and “bokeh” of the lens have also become important indexes to measure the imaging performances of the lens. At present, rotationally symmetric aspherical surfaces are mostly used. Such an aspherical surface has a sufficient degree of freedom only in a meridian plane, and cannot well correct off-axis aberration. The existing structures have insufficient refractive power allocation, lens spacing and lens shape settings, resulting in insufficient ultra-thinness and insufficient long focal length of the lenses. A free-form surface is a non-rotationally symmetric surface, which can better balance aberration and improve the imaging quality; besides, processing of the free-form surface has gradually become mature. With the increasing requirements for imaging of the lens, it is very important to provide a free-form surface in the design of a lens, especially in the design of wide-angle and ultra-wide-angle lenses.

SUMMARY

In view of the above-mentioned problems, a purpose of the present invention is to provide a camera optical lens, which has a long focal length and ultra-thinness, as well as excellent optical performance.

In order to solve the above-mentioned technical problem, an embodiment of the present invention provides a camera optical lens, including, from an object side to an image side, a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a negative refractive power, and a fifth lens. At least one of the first lens to the fifth lens has a free-form surface, and the camera optical lens satisfies following conditions: 0≤R7; and R10≤0, where R7 denotes a central curvature radius of an object side surface of the fourth lens, and R10 denotes a central curvature radius of an image side surface of the fifth lens.

In an improved embodiment, the camera optical lens further satisfies following conditions: 0.50≤d4/d6≤25.00, where d4 denotes an on-axis distance form an image side surface of the second lens to an object side surface of the third lens, and d6 denotes an on-axis distance from an image side surface of the third lens to the object side surface of the fourth lens.

In an improved embodiment, the camera optical lens further satisfies following conditions: 0.20≤f1/f≤0.76; −1.47≤(R1+R2)/(R1−R2)≤−0.29; and 0.08≤d1/TTL≤0.35, where f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens, R1 denotes a central curvature radius of an object side surface of the first lens, R2 denotes a central curvature radius of an image side surface of the first lens, d1 denotes an on-axis thickness of the first lens, and TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.

In an improved embodiment, the camera optical lens further satisfies following conditions: −1.06≤f2/f≤−0.33; 0.15≤(R3+R4)/(R3−R4)≤0.55; and 0.02≤d3/TTL≤0.06, where f denotes a focal length of the camera optical lens, f2 denotes a focal length of the second lens, R3 denotes a central curvature radius of an object side surface of the second lens, R4 denotes a central curvature radius of an image side surface of the second lens, d3 denotes an on-axis thickness of the second lens, and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.

In an improved embodiment, the camera optical lens further satisfies following conditions: 0.38≤f3/f≤1.75; −0.68≤(R5+R6)/(R5−R6)≤1.42; and 0.03≤d5/TTL≤0.13, where f denotes a focal length of the camera optical lens, f3 denotes a focal length of the third lens, R5 denotes a central curvature radius of an object side surface of the third lens, R6 denotes a central curvature radius of an image side surface of the third lens, d5 denotes an on-axis thickness of the third lens, and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.

In an improved embodiment, the camera optical lens further satisfies following conditions: −6.31≤f4/f≤−0.32; 0.54≤(R7+R8)/(R7−R8)≤6.15; and 0.02≤d7/TTL≤0.10, where f denotes a focal length of the camera optical lens, f4 denotes a focal length of the fourth lens, R8 denotes a central curvature radius of an image side surface of the fourth lens, d7 denotes an on-axis thickness of the fourth lens, and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis

In an improved embodiment, the camera optical lens further satisfies following conditions: −9.30≤f5/f≤−0.97; −6.69≤(R9+R10)/(R9−R10)≤−0.97; and 0.04≤d9/TTL≤0.15, where f denotes a focal length of the camera optical lens, f5 denotes a focal length of the fifth lens, R9 denotes a central curvature radius of an object side surface of the fifth lens, d9 denotes an on-axis thickness of the fifth lens, and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.

In an improved embodiment, the camera optical lens further satisfies following conditions: f/TTL≥1.00, where f denotes a focal length of the camera optical lens, and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.

In an improved embodiment, a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis is smaller than or equal to 8.59 mm.

In an improved embodiment, an F number of the camera optical lens is smaller than or equal to 2.47.

The beneficial effects of the present invention at least has the following beneficial effects. The camera optical lens according to the present invention has a long focal length and ultra-thinness, as well as excellent optical performance. Meanwhile, at least one of the first lens to the fifth lens has a free-form surface, which is beneficial to correct distortion and field curvature of the system and improve the imaging quality of the optical system, and is especially suitable for the mobile phone camera lens assembly and the WEB camera lens composed of imaging elements such as CCD and CMOS for high pixels.

BRIEF DESCRIPTION OF DRAWINGS

In order to more clearly illustrate technical solutions in embodiments of the present invention, the accompanying drawings used in the embodiments are briefly introduced as follows. It should be noted that the drawings described as follows are merely part of the embodiments of the present invention, and other drawings can also be acquired by those skilled in the art without paying creative efforts.

FIG. 1 is a schematic structural diagram of a camera optical lens according to Embodiment 1 of the present invention;

FIG. 2 illustrates a situation where an RMS spot diameter of the camera optical lens shown in FIG. 1 is within a first quadrant;

FIG. 3 is a schematic structural diagram of a camera optical lens according to Embodiment 2 of the present invention;

FIG. 4 illustrates a situation where an RMS spot diameter of the camera optical lens shown in FIG. 3 is within a first quadrant;

FIG. 5 is a schematic structural diagram of a camera optical lens according to Embodiment 3 of the present invention;

FIG. 6 illustrates a situation where an RMS spot diameter of the camera optical lens shown in FIG. 1 is within a first quadrant;

FIG. 7 is a schematic structural diagram of a camera optical lens according to Embodiment 4 of the present invention; and

FIG. 8 illustrates a situation where an RMS spot diameter of the camera optical lens shown in FIG. 1 is within a first quadrant.

DESCRIPTION OF EMBODIMENTS

In order to better illustrate the purpose, technical solutions and advantages of the present invention, the embodiments of the present invention will be described in details as follows with reference to the accompanying drawings. However, it should be understood by those skilled in the art that, technical details are set forth in the embodiments of the present invention so as to better illustrate the present invention. However, the technical solutions claimed in the present invention can be achieved without these technical details and various changes and modifications based on the following embodiments.

Embodiment 1

With reference to the accompanying drawings, the present invention provides a camera optical lens 10. FIG. 1 illustrates a camera optical lens 10 according to Embodiment 1 of the present invention. The camera optical lens 10 includes five lenses. Specifically, the camera optical lens 10 includes, from an object side to an image side, an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5. Optical elements such as an optical filter GF may be arranged between the fifth lens L5 and an image plane Si.

In this embodiment, the first lens L1 is made of a plastic material, the second lens L2 is made of a plastic material, the third lens L3 is made of a plastic material, the fourth lens L4 is made of a plastic material, and the fifth lens L5 is made of a plastic material. In other embodiments, the lenses may be made of other materials.

In this embodiment, at least one of the first lens L1 to the fifth lens L5 includes a free-form surface, and the free-form surface is beneficial to correct distortion and field curvature of the system, and improve imaging quality.

In this embodiment, the first lens L1 has a positive refractive power, and a focal length range of the first lens is specified. Within this conditional range, it is beneficial to achieve a wide angle of the system.

In this embodiment, the second lens L2 has a negative refractive power, and a focal length range of the second lens is specified. Within this conditional range, it is beneficial to improve the imaging performance of the system.

In this embodiment, the third lens L3 has a positive refractive power, and a focal length range of the third lens is specified. Within this conditional range, it is beneficial to improve the imaging quality.

In this embodiment, the fourth lens L4 has a negative refractive power, and a focal length range of the fourth lens is specified. Within this conditional range, it is beneficial to improve the imaging performance of the system.

It is defined that a central curvature radius of an object side surface of the fourth lens L4 is denoted by R7, and the camera optical lens satisfies the following condition: 0≤R7, which specifies a shape of the fourth lens. Within a range defined by this condition, it is beneficial to correct aberration and improve the image quality.

It is defined that a central curvature radius of an image side surface of the fifth lens L5 is denoted by R10, and the camera optical lens further satisfies the following condition: R10≤0, which specifies a shape of the fifth lens. Within a range defined by this condition, it is beneficial to correct the field curvature and improve the image quality.

It is defined that an on-axis distance from an image side surface of the second lens L2 to an object side surface of the third lens L3 is denoted by d4, an on-axis distance from an image side surface of the third lens L3 to an object side surface of the fourth lens L4 is denoted by d6, and the camera optical lens further satisfies the following condition: 0.50≤d4/d6≤25.00. Within a range defined by this condition, it is beneficial to reduce a total length of the system. As an example, the camera optical lens satisfies the following condition: 0.54≤d4/d6≤23.94.

In this embodiment, an object side surface of the first lens L1 is a convex surface at a paraxial position, and an image side surface of the first lens L1 is a convex surface at a paraxial position.

It is defined that a focal length of the first lens L1 denoted by f1, a focal length of the camera optical lens 10 denoted by f, and the camera optical lens further satisfies the following condition: 0.20≤f1/f≤0.76, which specifies a ratio of the focal length of the first lens L1 to the focal length of the camera optical lens 10. Within a range defined by this condition, the first lens has an appropriate positive refractive power, which is beneficial to reduce aberration of the system. As an example, the camera optical lens further satisfies the following condition: 0.31≤f1/f≤0.61.

A central curvature radius of the object side surface of the first lens L1 is denoted by R1, a central curvature radius of the image side surface of the first lens L1 is denoted by R2, and the camera optical lens further satisfies the following condition: −1.47≤(R1+R2)/(R1−R2)≤−0.29. By reasonably controlling a shape of the first lens L1, the first lens L1 can effectively correct spherical aberration of the system. As an example, the camera optical lens further satisfies the following condition: −0.92≤(R1+R2)/(R1−R2)≤−0.36.

An on-axis thickness of the first lens L1 is denoted by d1, a total optical length from the object side surface of the first lens to the image plane of the camera optical lens 10 along an optic axis is denoted by TTL, and the camera optical lens further satisfies the following condition: 0.08≤d1/TTL≤0.35. Within a range defined by this condition, it is beneficial to achieve ultra-thinness. As an example, the camera optical lens further satisfies the following condition: 0.13≤d1/TTL≤0.28.

In this embodiment, an object side surface of the second lens L2 is a concave surface at a paraxial position, and an image side surface of the second lens L2 is a concave surface at a paraxial position.

It is defined that a focal length of the second lens L2 is denoted by f2, the focal length of the camera optical lens 10 is denoted by f, and the camera optical lens further satisfies the following condition: −1.06≤f2/f≤−0.33. By controlling the negative refractive power of the second lens L2 within a reasonable range, it is beneficial to correct aberration of the optical system. As an example, the camera optical lens further satisfies the following condition: −0.66≤f2/f≤−0.41

A central curvature radius of the object side surface of the second lens L2 is denoted by R3, a central curvature radius of the image side surface of the second lens L2 is denoted by R4, and the camera optical lens further satisfies the following condition: 0.15≤(R3+R4)/(R3−R4)≤0.55, which specifies a shape of the second lens L2. Within a range defined by this condition, it is beneficial to correct longitudinal aberration. As an example, the camera optical lens further satisfies the following condition: 0.24≤(R3+R4)/(R3−R4)≤0.44.

An on-axis thickness of the second lens L2 is d3, a total optical length from the object side surface of the first lens to the image plane of the camera optical lens 10 along an optic axis is denoted by TTL, and the camera optical lens further satisfies the following condition: 0.02≤d3/TTL≤0.06. Within a range defined by this condition, it is beneficial to achieve ultra-thinness. As an example, the camera optical lens further satisfies the following condition: 0.03≤d3/TTL≤0.05.

In this embodiment, the object side surface of the third lens L3 is a convex surface at a paraxial position, and the image side surface of the third lens L3 is a convex surface at a paraxial position.

It is defined that a focal length of the third lens L3 is denoted by f3, the focal length of the camera optical lens 10 is denoted by f, and the camera optical lens further satisfies the following condition: 0.38≤f3/f≤1.75. Reasonable refractive power allocation enables the system to have better imaging quality and low sensitivity. As an example, the camera optical lens further satisfies the following condition:0.61≤f3/f≤1.40.

It is defined that a central curvature radius of the object side surface of the third lens L3 is denoted by R5, a central curvature radius of the image side surface of the third lens L3 is denoted by R6, and the camera optical lens further satisfies the following condition: −0.68≤(R5+R6)/(R5−R6)≤1.42, which specifies a shape of the third lens. Within a range defined by this condition, it is beneficial to alleviate a degree of deflection of light passing through the lens, and effectively reduce aberration. As an example, the camera optical lens further satisfies the following condition: −0.43≤(R5+R6)/(R5−R6)≤1.14.

An on-axis thickness of the third lens L3 is denoted by d5, the total optical length from the object side surface of the first lens to the image plane of the camera optical lens along an optic axis 10 is denoted by TTL, and the camera optical lens further satisfies the following condition: 0.03≤d5/TTL≤0.13. Within a range defined by this condition, it is beneficial to achieve ultra-thinness. As an example, the camera optical lens further satisfies the following condition: 0.04≤d5/TTL≤0.10.

In this embodiment, an object side surface of the fourth lens L4 is a convex surface at a paraxial position, and an image side surface of the fourth lens L4 is a concave surface at a paraxial position.

It is defined that a focal length of the fourth lens L4 is denoted by f4, the focal length of the camera optical lens 10 is denoted by f, and the camera optical lens further satisfies the following condition: −6.31≤f4/f≤−0.32, which specifies a ratio of the focal length of the fourth lens to the focal length of the system. Within a range defined by this condition, it is beneficial to improve the performance of the optical system. As an example, the camera optical lens further satisfies the following condition: −3.94≤f4/f≤−0.40.

A central curvature radius of the object side surface of the fourth lens L4 is denoted by R7, a central curvature radius of the image side surface of the fourth lens L4 is denoted by R8, and the camera optical lens further satisfies the following condition: 0.54≤(R7+R8)/(R7−R8)≤6.15, which specifies a shape of the fourth lens L4. Within a range defined by this condition, it is beneficial to correcting off-axis aberration. As an example, the camera optical lens further satisfies the following condition: 0.87≤(R7+R8)/(R7−R8)≤4.92.

An on-axis thickness of the fourth lens L4 is denoted by d7, the total optical length from the object side surface of the first lens to the image plane of the camera optical lens 10 along an optic axis is denoted by TTL, and the camera optical lens further satisfies the following condition: 0.02≤d7/TTL≤0.10. Within a range defined by this condition, it is beneficial to achieve ultra-thinness. As an example, the camera optical lens further satisfies the following condition: 0.03≤d7/TTL≤0.08.

In this embodiment, the fifth lens L5 has a negative refractive power, an object side surface of the fifth lens L5 is a concave surface at a paraxial position, and an image side surface of the fifth lens L5 is a convex surface at a paraxial position. In other embodiments, the fifth lens L5 may have a positive refractive power.

It is defined that a focal length of the fifth lens L5 is denoted by f5, the focal length of the camera optical lens 10 is denoted by f, and the camera optical lens further satisfies the following condition: −9.30≤f5/f≤−0.97. The limitation on the fifth lens L5 can effectively smooth a light angle of the camera lens and reduce tolerance sensitivity. As an example, the camera optical lens further satisfies the following condition: −5.81≤f5/f≤−1.21.

A central curvature radius of the object side surface of the fifth lens is denoted by R9, a central curvature radius of the image side surface of the fifth lens is denoted by R10, and the camera optical lens further satisfies the following condition: −6.69≤(R9+R10)/(R9−R10)≤−0.97, which specifies a shape of the fifth lens L5. Within a range defined by this condition, it is beneficial to correct off-axis aberration. As an example, the camera optical lens further satisfies the following condition: −4.18≤(R9+R10)/(R9−R10)≤−1.21.

An on-axis thickness of the fifth lens L5 is denoted by d9, the total optical length from the object side surface of the first lens to the image plane of the camera optical lens along an optic axis 10 is denoted by TTL, and the camera optical lens further satisfies the following condition: 0.04≤d9/TTL≤0.15. Within a range defined by this condition, it is beneficial to achieve ultra-thinness. As an example, the camera optical lens further satisfies the following condition: 0.06≤d9/TTL≤0.12.

In this embodiment, a focal length of the camera optical lens 10 is denoted by f, the total optical length from the object side surface of the first lens to the image plane of the camera optical lens along an optic axis 10 is denoted by TTL, and the camera optical lens further satisfies the following condition: f/TTL≥1.00, so that ultra-thinness can be achieved.

In this embodiment, the total optical length TTL of the camera optical lens 10 is smaller than or equal to 8.59 mm, so that it is beneficial to achieve ultra-thinness. As an example, the total optical length TTL of the camera optical lens 10 is smaller than or equal to 8.20 mm.

In this embodiment, an F number FNO of the camera optical lens 10 is smaller than or equal to 2.47, so that a large aperture can be achieved and the camera optical lens can have good imaging performance. As an example, the F number FNO of the camera optical lens 10 is smaller than or equal to 2.42.

When the above-mentioned conditions are satisfied, the camera optical lens 10 has good optical performance, and when the free-form surface is adopted, the designed image plane area can be matched with an actual use area, thereby improving the image quality of the effective area to the greatest extent; and based on the characteristics of the camera optical lens 10, the camera optical lens 10 is especially suitable for a mobile phone camera lens assembly and a WEB camera lens composed of imaging elements such as CCD and CMOS for high pixels.

The camera optical lens 10 of the present invention will be described in the following by examples. The symbols described in each example are as follows. The focal length, the on-axis distance, the curvature radius, and the on-axis thickness are all expressed in units of mm.

TTL: a total optical length (an on-axis distance from the object side surface of the first lens L1 to the image plane along an optic axis), with a unit of mm.

FNO: F number (a ratio of an effective focal length of the camera optical lens to an entrance pupil diameter).

Table 1 and Table 2 show design data of the camera optical lens 10 according to Embodiment 1 of the present invention. Herein, the object side surface and the image side surface of the fourth lens L4 are free-form surfaces.

TABLE 1 R d nd vd S1 ∞ d0 = −0.424  R1 1.802 d1 = 0.919 nd1 1.5444 v1 55.82 R2 −11.871   d2 = 0.347 R3 −5.921  d3 = 0.237 nd2 1.6610 v2 20.53 R4 3.147 d4 = 0.498 R5 6.638 d5 = 0.485 nd3 1.6610 v3 20.53 R6 −13.515   d6 = 0.824 R7 6.099 d7 = 0.370 nd4 1.5444 v4 55.82 R8 3.698 d8 = 0.800 R9 −3.600  d9 = 0.577 nd5 1.5444 v5 55.82 R10 −18.071   d10 = 0.236 R11 ∞ d11 = 0.210 ndg 1.5168 vg 64.17 R12 ∞ d12 = 0.204

Herein, the symbols in the tables are defined as follows.

S1: aperture;

R: curvature radius at a center of an optical surface;

R1: central curvature radius of an object side surface of a first lens L1;

R2: central curvature radius of an image side surface of the first lens L1;

R3: central curvature radius of an object side surface of a second lens L2;

R4: central curvature radius of an image side surface of the second lens L2;

R5: central curvature radius of an object side surface of a third lens L3;

R6: central curvature radius of an image side surface of the third lens L3;

R7: central curvature radius of an object side surface of a fourth lens L4;

R8: central curvature radius of an image side surface of the fourth lens L4;

R9: central curvature radius of an object side surface of a fifth lens L5;

R10: central curvature radius of an image side surface of the fifth lens L5;

R11: central curvature radius of an object side surface of an optical filter GF;

R12: central curvature radius of an image side surface of the optical filter GF;

d: on-axis thickness of a lens, and on-axis distance between lenses;

d0: on-axis distance from the aperture S1 to the object side surface of the first lens L1;

d1: on-axis thickness of the first lens L1;

d2: on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

d3: on-axis thickness of the second lens L2;

d4: on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

d5: on-axis thickness of the third lens L3;

d6: on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

d7: on-axis thickness of the fourth lens L4;

d8: on-axis distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

d9: on-axis thickness of the fifth lens L5;

d10: on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the optical filter GF;

d11: on-axis thickness of the optical filter GF;

d12: on-axis distance from the image side surface of the optical filter GF to an image plane;

nd: refractive index of d-line;

nd1: refractive index of d-line of the first lens L1;

nd2: refractive index of d-line of the second lens L2;

nd3: refractive index of d-line of the third lens L3;

nd4: refractive index of d-line of the fourth lens L4;

nd5: refractive index of d-line of the fifth lens L5;

ndg: refractive index of d-line of the optical filter GF;

vd: abbe number;

v1: abbe number of the first lens L1;

v2: abbe number of the second lens L2;

v3: abbe number of the third lens L3;

v4: abbe number of the fourth lens L4;

v5: abbe number of the fifth lens L5;

vg: abbe number of the optical filter GF.

Table 2 shows aspherical data of the respective lenses in the camera optical lens 10 according to Embodiment 1 of the present invention.

TABLE 2 Cone coefficient Aspherical coefficient k A4 A6 A8 A10 A12 R1 1.0911E−02 −1.6426E−03 2.7887E−03 −4.7627E−03  4.9390E−03 −1.3217E−03  R2 8.7715E+01  3.6422E−02 −6.8373E−03   9.4042E−03 −3.3844E−03 −1.9701E−03  R3 2.3080E+01  7.5944E−02 8.2889E−03 −2.5989E−02 −2.9377E−03 1.0345E−02 R4 3.8587E+00  8.0758E−03 7.5561E−02 −6.3539E−02 −4.8156E−03 2.2969E−02 R5 −1.1578E+02  −3.8480E−02 2.7099E−02  7.7042E−03  3.7745E−03 −5.3106E−03  R6 7.7668E+01 −8.1482E−02 5.4953E−02 −1.4213E−02  3.6905E−03 2.7175E−03 R9 6.4735E−01 −6.4285E−03 7.6790E−03 −1.5498E−03 −1.7815E−04 6.8615E−05 R10 −6.9814E+02  −5.4005E−02 1.3293E−02 −2.4950E−03  9.3033E−05 6.5614E−06 k A14 A16 A18 A20 R1 1.0911E−02 −7.5372E−04 2.6062E−04  2.0601E−04 −9.0498E−05 R2 8.7715E+01 −8.6161E−04 1.5711E−03  9.3150E−04 −6.4769E−04 R3 2.3080E+01  2.4745E−03 −1.4506E−03   4.9774E−04 −7.3690E−04 R4 3.8587E+00  7.1716E−03 −5.0849E−03  −1.6482E−03 −9.6234E−04 R5 −1.1578E+02  −2.0509E−03 2.1775E−03  1.0423E−03 −8.7722E−04 R6 7.7668E+01 −2.2872E−03 9.8753E−04 −2.7942E−04 −9.0825E−05 R9 6.4735E−01  2.1367E−05 −3.8150E−06   5.1031E−07 −1.5481E−07 R10 −6.9814E+02  −2.2364E−06 7.2491E−07  1.5701E−09 −5.2044E−10

z=(cr ²)/{1+[1−(k+1)(c ² r ²)]^(1/2) }+A4r ⁴ +A6r ⁶ +A8r ⁸ +A10r ¹⁰ +A12r ¹² +A14r ¹⁴ +A16r ¹⁶ +A18r ¹⁸ +A20r ²⁰   (1)

Herein, k represents a cone coefficient, A4, A6, A8, A10, A12, A14, A16, A18, and A20 represent aspherical coefficients, c represents a curvature at a center of an optical surface, r represents a vertical distance between a point on an aspherical curve and an optic axis, Z represents an aspherical depth (a vertical distance between a point on the aspherical surface that is distanced from the optic axis by r and a tangent plane tangent to a vertex of the aspherical surface on the optic axis).

For convenience, the aspherical surface of each of the respective lenses adopts the aspherical surface shown in the above equation (1). However, the present invention is not limited to the aspherical surface defined by the polynomial form expressed by the equation (1).

Table 3 shows free-form surface data in the camera optical lens 10 according to Embodiment 1 of the present invention.

TABLE 3 Free-form surface coefficient k X⁴Y⁰ X²Y² X⁰Y⁴ X⁶Y⁰ X⁴Y² X²Y⁴ X⁰Y⁶ R7  1.5016E+01 −1.8121E−01 −3.6596E−01 −1.8154E−01  2.0376E−02  6.2333E−02  6.4598E−02  2.0794E−02 R8  2.3520E+00 −1.2356E−01 −2.5110E−01 −1.2325E−01  2.4623E−02  7.5643E−02  7.8358E−02  2.4327E−02 X⁴Y⁶ X²Y⁸ X⁰Y¹⁰ X¹²Y⁰ X¹⁰Y² X⁸Y⁴ X⁶Y⁶ X⁴Y⁸ R7 −5.3968E−02 −2.8059E−02 −6.8206E−03  3.8758E−03  2.3290E−02  5.6952E−02  7.5747E−02  5.7689E−02 R8 −7.6941E−03 −3.2633E−03 −5.3456E−04 −6.7421E−04 −3.8345E−03 −9.5391E−03 −1.2585E−02 −9.7294E−03 X²Y¹² X⁰Y¹⁴ X¹⁶Y⁰ X¹⁴Y² X¹²Y⁴ X¹⁰Y⁶ X⁸Y⁸ X⁶Y¹⁰ R7 −1.3048E−02 −8.6638E−04  2.2990E−04  1.5418E−03  8.4423E−03  1.7079E−02  1.8861E−02  1.2474E−02 R8  1.6617E−03  1.4014E−04 −6.0091E−05 −4.4712E−04 −1.5795E−03 −3.1314E−03 −3.8677E−03 −3.1547E−03 X⁸Y¹⁰ X⁶Y¹² X⁴Y¹⁴ X²Y¹⁶ X⁰Y¹⁸ X²⁰Y⁰ X¹⁸Y² X¹⁶Y⁴ R7 −6.8112E−04 −5.3661E−03 −1.1416E−02  4.5295E−03 −2.3375E−04 −4.6904E−06  1.9721E−05 −8.0698E−04 R8  2.7689E−03  1.8389E−03  7.5505E−04  1.1247E−04  2.9794E−05 −4.6829E−06 −4.3274E−05 −1.5981E−04 X⁸Y⁰ X⁶Y² X⁴Y⁴ X²Y⁶ X⁰Y⁸ X¹⁰Y⁰ X⁸Y² X⁶Y⁴ R7  6.2869E−03  2.4303E−02  3.7482E−02  2.6135E−02  6.6645E−03 −5.5734E−03 −2.7773E−02 −6.0947E−02 R8  2.4205E−03  8.2088E−03  1.1048E−02  8.6087E−03  1.9758E−03 −8.6909E−04 −3.4700E−03 −6.7356E−03 X²Y¹⁰ X⁰Y¹² X¹⁴Y⁰ X¹²Y² X¹⁰Y⁴ X⁸Y⁶ X⁶Y⁸ X⁴Y¹⁰ R7  2.3444E−02  3.7342E−03 −1.9075E−03 −1.3543E−02 −3.8391E−02 −6.5625E−02 −6.7329E−02 −4.2636E−02 R8 −3.7903E−03 −4.7625E−04  2.8386E−04  1.6219E−03  4.8112E−03  8.1922E−03  8.1704E−03  4.7897E−03 X⁴Y¹² X²Y¹⁴ X⁰Y¹⁶ X¹⁸Y⁰ X¹⁶Y² X¹⁴Y⁴ X¹²Y⁶ X¹⁰Y⁸ R7  5.1821E−03  3.2760E−03 −4.9777E−05 −8.2211E−05 −8.2219E−04 −2.2115E−03 −5.1238E−03 −6.7885E−03 R8 −1.5563E−03 −4.4977E−04 −4.3208E−05  2.1578E−05  1.9302E−04  7.9662E−04  1.8404E−03  2.7224E−03 X¹⁴Y⁶ X¹²Y⁸ X¹⁰Y¹⁰ X⁸Y¹² X⁶Y¹⁴ X⁴Y¹⁶ X²Y¹⁸ X⁰Y²⁰ R7 −5.1469E−03 −6.2091E−03 −1.6921E−02 −1.1844E−03  2.6763E−03  4.6162E−03 −5.1497E−03  7.3456E−05 R8 −4.4987E−04 −8.9918E−04 −1.0382E−03 −7.5409E−04 −3.8449E−04 −1.3139E−04 −8.6000E−05 −8.0801E−06

$\begin{matrix} {Z = {\frac{cr^{2}}{1 + \sqrt{1 - {\left( {1 + k} \right)c^{2}r^{2}}}} + {\sum_{i = 1}^{N}{B_{i}{E_{i}\left( {x,y} \right)}}}}} & (2) \end{matrix}$

Herein in the equation (2), k represents a cone coefficient, Bi represents an aspherical coefficient, c represents a curvature at the center of a optical surface, r represents a vertical distance between a point on the free-form surface and an optic axis, x represents an x-direction component of r, y represents a y-direction component of r, z represents an aspherical depth (a vertical distance between a point on the aspherical surface that is distanced from the optic axis by r and a tangent plane tangent to a vertex of the aspherical surface on the optic axis).

For convenience, each free-form surface adopts the surface type defined by the extended polynomial shown in the above equation (2). However, the present invention is not limited to the free-form surface defined by the polynomial form expressed by the equation (2).

FIG. 2 illustrates a situation where an RMS spot diameter of the camera optical lens 10 according to Embodiment 1 is within a first quadrant. According to FIG. 2, it can be seen that the camera optical lens 10 according to Embodiment 1 can achieve good imaging quality.

Various numerical values corresponding to the parameters already specified in the conditions for each of Embodiments 1, 2, 3 and 4 are listed in Table 13.

As shown in Table 13, Embodiment 1 satisfies respective conditions.

In this embodiment, an entrance pupil diameter ENPD of the camera optical lens 10 is 2.399 mm, the full field of view image height IH (in a diagonal direction) is 5.000 mm, the image height in an x direction is 4.000 mm, the image height in a y direction is 3.000 mm, and the imaging effect is the best in this rectangular area; the FOV in a diagonal direction is 45.81°, the FOV in the x direction is 37.66°, and the FOV in the y direction is 28.92°. The camera optical lens 10 satisfies the design requirements of a long focal length and ultra-thinness, its longitudinal and lateral color aberrations are sufficiently corrected, and the camera optical lens has excellent optical characteristics.

Embodiment 2

Embodiment 2 is basically the same as Embodiment 1, the symbols in Embodiment 2 are defined the same as those in Embodiment 1, and only the difference from

Embodiment 1 will be described in the following.

FIG. 3 is a schematic structural diagram of a camera optical lens according to Embodiment 2 of the present invention. Table 4 and Table 5 show design data of the camera optical lens 20 according to Embodiment 2 of the present invention. Herein, the object side surface and the image side surface of the fifth lens L5 are free-form surfaces.

TABLE 4 R d nd vd S1 ∞ d0 = −0.434  R1 1.809 d1 = 0.934 nd1 1.5444 v1 55.82 R2 −11.928   d2 = 0.341 R3 −5.940  d3 = 0.249 nd2 1.6610 v2 20.53 R4 3.128 d4 = 0.488 R5 6.698 d5 = 0.483 nd3 1.6610 v3 20.53 R6 −13.507   d6 = 0.832 R7 6.089 d7 = 0.370 nd4 1.5444 v4 55.82 R8 3.701 d8 = 0.826 R9 −3.801  d9 = 0.580 nd5 1.5444 v5 55.82 R10 −20.647   d10 = 0.237 R11 ∞ dl 1 = 0.210 ndg 1.5168 vg 64.17 R12 ∞ d12 = 0.203

Table 5 shows aspherical data of the respective lenses in the camera optical lens 20 according to Embodiment 2 of the present invention.

TABLE 5 Cone coefficient Aspherical coefficient k A4 A6 A8 A10 A12 R1 7.9633E−03 −1.8891E−03  2.8900E−03 −4.7702E−03  4.7176E−03 −1.2780E−03 R2 8.9006E+01 3.6307E−02 −6.5704E−03   9.4633E−03 −3.4328E−03 −2.0329E−03 R3 2.3333E+01 7.6497E−02 8.6184E−03 −2.5772E−02 −2.6080E−03  9.2813E−03 R4 3.8428E+00 9.1134E−03 7.5201E−02 −6.3859E−02 −5.0831E−03  2.2621E−02 R5 −1.2075E+02  −3.7767E−02  2.6970E−02  7.5675E−03  3.9698E−03 −5.4665E−03 R6 7.3163E+01 −8.1898E−02  5.5388E−02 −1.3970E−02  3.6869E−03  2.6272E−03 R7 1.5767E+01 −1.8183E−01  2.0070E−02  6.5006E−03 −5.3559E−03  3.9681E−03 R8 2.4647E+00 −1.2475E−01  2.5575E−02  1.6946E−03 −7.6580E−04 −6.2534E−04 k A14 A16 A18 A20 R1 7.9633E−03 −5.2598E−04  2.1332E−04  6.5635E−05 −2.9664E−05 R2 8.9006E+01 −9.0258E−04  1.5610E−03  9.4334E−04 −6.2586E−04 R3 2.3333E+01 1.8006E−03 4.2895E−04 −7.6969E−04 −3.1255E−04 R4 3.8428E+00 6.7323E−03 −5.5014E−03  −1.7634E−03 −3.3195E−04 R5 −1.2075E+02  −2.1949E−03  2.0710E−03  1.0056E−03 −8.1235E−04 R6 7.3163E+01 −2.3565E−03  9.4911E−04 −2.9626E−04 −6.4316E−05 R7 1.5767E+01 −1.9225E−03  2.1167E−04 −7.6009E−05  8.1879E−06 R8 2.4647E+00 2.4304E−04 −5.3405E−05   2.1063E−05 −4.1486E−06

Table 6 shows the free-form surface data in the camera optical lens 20 according to Embodiment 2 of the present invention.

TABLE 6 Free-form surface coefficient k X⁴Y⁰ X²Y² X⁰Y⁴ X⁶Y⁰ X⁴Y² X²Y⁴ X⁰Y⁶ R9  2.1058E−01 −8.3934E−04 −1.6329E−03 −2.3708E−04  7.5947E−03  2.2456E−02  2.2675E−02  8.2660E−03 R10 −8.8100E+02 −5.0228E−02 −1.0174E−01 −4.9252E−02  1.4524E−02  4.3860E−02  4.4019E−02  1.5275E−02 X⁴Y⁶ X²Y⁸ X⁰Y¹⁰ X¹²Y⁰ X¹⁰Y² X⁸Y⁴ X⁶Y⁶ X⁴Y⁸ R9 −1.9295E−03 −9.1700E−04 −2.2338E−04  6.2548E−05  3.6713E−04  9.1603E−04  1.2280E−03  9.2928E−04 R10  7.0857E−04  3.7680E−04  5.6395E−05  7.0525E−06  3.1445E−05  7.5208E−05  1.0246E−04  8.0906E−05 X²Y¹² X⁰Y¹⁴ X¹⁶Y⁰ X¹⁴Y² X¹²Y⁴ X¹⁰Y⁶ X⁸Y⁸ X⁶Y¹⁰ R9  2.0910E−04  1.6401E−05 −4.2276E−06 −3.3922E−05 −1.2013E−04 −2.3942E−04 −2.9843E−04 −2.3865E−04 R10 −4.7514E−06 −2.5552E−06  1.0333E−06  7.3752E−06  2.5698E−05  5.0452E−05  6.3481E−05  5.2457E−05 X⁸Y¹⁰ X⁶Y¹² X⁴Y¹⁴ X²Y¹⁶ X⁰Y¹⁸ X²⁰Y⁰ X¹⁸Y² X¹⁶Y⁴ R9  6.6230E−05  4.3213E−05  1.5368E−05  2.6314E−06  2.7948E−07 −9.0839E−08 −8.5382E−07 −4.2744E−06 R10  1.8184E−06  1.9891E−06  1.8235E−06  1.4983E−06  1.9923E−08 −2.4955E−08 −1.1595E−07 −4.3207E−07 X⁸Y⁰ X⁶Y² X⁴Y⁴ X²Y⁶ X⁰Y⁸ X¹⁰Y⁰ X⁸Y² X⁶Y⁴ R9 −1.5724E−03 −6.3431E−03 −9.4995E−03 −6.2042E−03 −1.6020E−03 −1.9127E−04 −9.7617E−04 −1.9554E−03 R10 −2.5540E−03 −1.0148E−02 −1.5226E−02 −1.0063E−02 −2.5246E−03  6.9886E−05  3.5128E−04  6.9958E−04 X²Y¹⁰ X⁰Y¹² X¹⁴Y⁰ X¹²Y² X¹⁰Y⁴ X⁸Y⁶ X⁶Y⁸ X⁴Y¹⁰ R9  5.3366E−04  5.4705E−05  1.9376E−05  1.3266E−04  3.9594E−04  6.6238E−04  6.6427E−04  4.0194E−04 R10  4.7225E−05  1.8910E−06 −8.2510E−07 −1.1249E−05 −3.4760E−05 −5.9465E−05 −5.7308E−05 −2.9118E−05 X⁴Y¹² X²Y¹⁴ X⁰Y¹⁶ X¹⁸Y⁰ X¹⁶Y² X¹⁴Y⁴ X¹²Y⁶ X¹⁰Y⁸ R9 −1.1878E−04 −2.6995E−05 −5.3312E−06  5.1553E−07  4.8843E−06  1.8749E−05  4.4027E−05  6.6596E−05 R10  2.7459E−05  9.6439E−06  7.6611E−07  1.1070E−08  1.1425E−07  5.4197E−07  1.0207E−06  1.3862E−06 X¹⁴Y⁶ X¹²Y⁸ X¹⁰Y¹⁰ X⁸Y¹² X⁶Y¹⁴ X⁴Y¹⁶ X²Y¹⁸ X⁰Y²⁰ R9 −1.1292E−05 −1.9474E−05 −2.3424E−05 −1.9843E−05 −1.2257E−05 −7.2066E−06  2.6396E−06  6.6767E−08 R10 −1.2427E−06 −2.2894E−06 −2.6434E−06 −1.8104E−06  1.4789E−06 −1.2017E−06  1.3496E−06  8.9580E−09

FIG. 4 illustrates a situation where an RMS spot diameter of the camera optical lens 20 according to Embodiment 2 is within a first quadrant. According to FIG. 4, it can be seen that the camera optical lens 20 according to Embodiment 2 can achieve good imaging quality.

As shown in Table 13, Embodiment 2 satisfies the respective conditions.

In this embodiment, an entrance pupil diameter ENPD of the camera optical lens 20 is 2.417 mm, the full field of view image height IH (in a diagonal direction) is 5.000 mm, the image height in an x direction is 4.000 mm, the image height in a y direction is 3.000 mm, and the imaging effect is the best in this rectangular area; the FOV in a diagonal direction is 45.61°, the FOV in the x direction is 37.45°, and the FOV in the y direction is 28.73°. The camera optical lens 20 satisfies the design requirements of a long focal length and ultra-thinness, its longitudinal and lateral color aberrations are sufficiently corrected, and the camera optical lens has excellent optical characteristics.

Embodiment 3

Embodiment 3 is basically the same as Embodiment 1, the symbols in Embodiment 3 are defined the same as those in Embodiment 1, and only the difference from Embodiment 1 will be described in the following.

FIG. 5 is a schematic structural diagram of a camera optical lens 30 according to Embodiment 3 of the present invention. Table 7 and Table 8 show design data of the camera optical lens 30 according to Embodiment 3 of the present invention. Herein, the object side surface and the image side surface of the second lens L2 are free-form surfaces.

TABLE 7 R d nd vd S1 ∞ d0 = −0.904  R1  2.435 d1 = 1.836 nd1 1.5438 v1 56.03 R2 −6.230 d2 = 0.210 R3 −8.788 d3 = 0.287 nd2 1.6610 v2 20.53 R4  4.396 d4 = 1.118 R5 192.589  d5 = 0.430 nd3 1.6610 v3 20.53 R6 −5.242 d6 = 0.050 R7 55.556 d7 = 0.250 nd4 1.5438 v4 56.03 R8  2.672 d8 = 1.958 R9 −7.918 d9 = 0.621 nd5 1.5346 v5 55.69 R10 −43.272  d10 = 0.500 R11 ∞ d11 = 0.210 ndg 1.5168 vg 64.17 R12 ∞ d12 = 0.340

Table 8 shows aspherical data of the respective lenses in the camera optical lens 30 according to Embodiment 3 of the present invention.

TABLE 8 Cone coefficient Aspherical coefficient k A4 A6 A8 A10 A12 R1 −7.2105E−02 −2.1686E−04 3.6395E−04 −9.9837E−04  9.0683E−04 −4.2019E−04 R2 7.9852E+00  5.1389E−03 7.8087E−03 −3.8963E−03  2.2819E−03 −1.1148E−03 R5 −3.7000E+01 −2.2640E−02 −4.8816E−02  4.6764E−03 3.5422E−02 −3.8609E−02 R6  1.1341E+00 −6.5332E−02 5.8551E−02 −5.3421E−02  1.4859E−02  2.6033E−03 R7 −1.0000E+01 −8.5120E−02 2.3439E−01 −1.8719E−01  2.1065E−02  5.6864E−02 R8 −2.8318E+00  1.2828E−02 1.1525E−01 −1.0062E−01  2.1362E−02  1.5754E−02 R9  3.1923E+00 −3.9132E−02 2.4821E−02 −1.6840E−02  9.9088E−03 −3.9191E−03 R10 −7.6810E+00 −6.0160E−02 2.1019E−02 −1.0187E−02  2.8439E−03  5.7136E−05 k A14 A16 A18 A20 R1 −7.2105E−02  9.2773E−05 −8.0567E−06  0.0000E+00 0.0000E+00 R2  7.9852E+00  2.9082E−04 −2.8835E−05  0.0000E+00 0.0000E+00 R5 −3.7000E+01  1.5857E−02 −2.1749E−03  0.0000E+00 0.0000E+00 R6  1.1341E+00 −2.3829E−03 4.3833E−04 0.0000E+00 0.0000E+00 R7 −1.0000E+01 −3.9107E−02 1.0953E−02 −1.2386E−03  0.0000E+00 R8 −2.8318E+00 −9.9609E−03 1.5966E−03 0.0000E+00 0.0000E+00 R9  3.1923E+00  9.3097E−04 −1.1721E−04  6.0346E−06 0.0000E+00 R10 −7.6810E+00 −3.7343E−04 1.3282E−04 −2.0928E−05  1.3204E−06

Table 9 shows free-form surface data in the camera optical lens 30 according to Embodiment 3 of the present invention.

TABLE 9 Free-form surface coefficient k X⁴Y⁰ X²Y² X⁰Y⁴ X⁶Y⁰ X⁴Y² X²Y⁴ X⁰Y⁶ R3  9.9880E+00 −4.0723E−02 −8.1801E−02 −4.0851E−02  3.8458E−02  1.1569E−01  1.1609E−01  3.8607E−02 R4  4.9320E+00 −4.6764E−02 −9.4015E−02 −4.6897E−02  3.5527E−02  1.0780E−01  1.0779E−01  3.5752E−02 X⁴Y⁶ X²Y⁸ X⁰Y¹⁰ X¹²Y⁰ X¹⁰Y² X⁸Y⁴ X⁶Y⁶ X⁴Y⁸ R3 −2.7188E−01 −1.3603E−01 −2.7214E−02  2.2107E−02  1.3278E−01  3.3206E−01  4.4268E−01  3.3196E−01 R4 −2.1759E−01 −1.0853E−01 −2.1983E−02  1.9113E−02  1.1511E−01  2.8779E−01  3.8601E−01  2.8716E−01 X²Y¹² X⁰Y¹⁴ X¹⁶Y⁰ X¹⁴Y² X¹²Y⁴ X¹⁰Y⁶ X⁸Y⁸ X⁶Y¹⁰ R3 −6.3614E−02 −9.0837E−03  1.9702E−03  1.5663E−02  5.4726E−02  1.0957E−01  1.3685E−01  1.0962E−01 R4 −5.3867E−02 −7.5706E−03  1.2727E−03  9.9605E−03  3.6271E−02  7.1425E−02  9.0340E−02  7.2000E−02 X⁸Y¹⁰ X⁶Y¹² X⁴Y¹⁴ X²Y¹⁶ X⁰Y¹⁸ X²⁰Y⁰ X¹⁸Y² X¹⁶Y⁴ R3 −2.2019E−02 −1.4721E−02 −6.3240E−03 −1.5662E−03 −1.7581E−04  0.0000E+00  0.0000E+00  0.0000E+00 R4  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00 X⁸Y⁰ X⁶Y² X⁴Y⁴ X²Y⁶ X⁰Y⁸ X¹⁰Y⁰ X⁸Y² X⁶Y⁴ R3  4.3984E−03  1.8213E−02  2.6487E−02  1.7576E−02  4.4554E−03 −2.7078E−02 −1.3626E−01 −2.7201E−01 R4  1.4994E−03  5.3294E−03  6.8499E−03  5.3665E−03  1.5448E−03 −2.1639E−02 −1.0891E−01 −2.1493E−01 X²Y¹⁰ X⁰Y¹² X¹⁴Y⁰ X¹²Y² X¹⁰Y⁴ X⁸Y⁶ X⁶Y⁸ X⁴Y¹⁰ R3  1.3291E−01  2.2131E−02 −9.1134E−03 −6.3571E−02 −1.9083E−01 −3.1793E−01 −3.1817E−01 −1.9085E−01 R4  1.1513E−01  1.9243E−02 −7.6712E−03 −5.3284E−02 −1.6319E−01 −2.6939E−01 −2.7369E−01 −1.5796E−01 X⁴Y¹² X²Y¹⁴ X⁰Y¹⁶ X¹⁸Y⁰ X¹⁶Y² X¹⁴Y⁴ X¹²Y⁶ X¹⁰Y⁸ R3  5.4853E−02  1.5619E−02  1.9581E−03 −1.7683E−04 −1.5812E−03 −6.2825E−03 −1.4704E−02 −2.2028E−02 R4  3.4089E−02  1.0195E−02  1.2227E−03  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00 X¹⁴Y⁶ X¹²Y⁸ X¹⁰Y¹⁰ X⁸Y¹² X⁶Y¹⁴ X⁴Y¹⁶ X²Y¹⁸ X⁰Y²⁰ R3  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00 R4  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00

FIG. 6 illustrates a situation where an RMS spot diameter of the camera optical lens 30 according to Embodiment 3 is within a first quadrant. According to FIG. 6, it can be seen that the camera optical lens 30 according to Embodiment 3 can achieve good imaging quality.

The numerical values corresponding to the respective conditions in this embodiment are listed in Table 13. It can be seen that the imaging optical system according to this embodiment satisfies the above-mentioned conditions.

In this embodiment, an entrance pupil diameter ENPD of the camera optical lens 30 is 3.969 mm, the full field of view image height IH (in a diagonal direction) is 4.400 mm, the image height in an x direction is 3.520 mm, the image height in a y direction is 2.640 mm, and the imaging effect is the best in this rectangular area; the FOV in the diagonal direction is 27.92°, the FOV in the x direction is 22.49°, and the FOV in the y direction is 16.96°. The camera optical lens 30 satisfies the design requirements of a long focal length angle and ultra-thinness, its longitudinal and lateral color aberrations are sufficiently corrected, and the camera optical lens has excellent optical characteristics.

Embodiment 4

Embodiment 4 is basically the same as Embodiment 1, the symbols in Embodiment 4 are defined the same as those in Embodiment 1, and only the difference from

Embodiment 1 will be described in the following.

FIG. 7 is a schematic structural diagram of a camera optical lens 40 according to Embodiment 4 of the present invention. Table 10 and Table 11 show design data of the camera optical lens 40 according to Embodiment 4 of the present invention. Herein, the object side surface and the image side surface of the second lens L2 are free-form surfaces.

TABLE 10 R d nd vd S1 ∞ d0 = −0.907  R1  2.419 d1 = 1.835 nd1 1.5438 v1 56.03 R2 −6.269 d2 = 0.200 R3 −9.343 d3 = 0.290 nd2 1.6610 v2 20.53 R4  4.308 d4 = 1.144 R5 19.292 d5 = 0.425 nd3 1.6610 v3 20.53 R6 −5.833 d6 = 0.050 R7 53.609 d7 = 0.250 nd4 1.5438 v4 56.03 R8  2.217 d8 = 1.904 R9 −9.875 d9 = 0.662 nd5 1.5346 v5 55.69 R10 −18.290  d10 = 0.500 R11 ∞ d11 = 0.210 ndg 1.5168 vg 64.17 R12 ∞ d12 = 0.340

Table 11 shows aspherical data of the respective lenses in the camera optical lens 40 according to Embodiment 4 of the present invention.

TABLE 11 Cone coefficient Aspherical coefficient k A4 A6 A8 A10 A12 R1 −8.0560E−02 −2.0074E−04  1.6837E−04 −6.5370E−04 6.3233E−04 −3.1588E−04 R2  8.0341E+00 5.2333E−03  7.4218E−03 −3.8256E−03 2.4469E−03 −1.2413E−03 R5 −3.7000E+01 −2.9784E−02 −3.6594E−02 −6.2538E−03 4.3225E−02 −4.5133E−02 R6  1.1341E+00 −5.3540E−02  3.5516E−02 −2.2383E−02 −1.3600E−02 1.7550E−02 R7 −1.0000E+01 −7.9573E−02  1.8942E−01 −1.3570E−01 −1.7780E−02 8.0746E−02 R8 −3.8471E+00  1.3622E−02  1.0975E−01 −1.1836E−01 5.4043E−02 −5.4153E−03 R9  4.3210E+00 −3.3872E−02  2.6204E−02 −2.0645E−02 1.1884E−02 −4.3910E−03 R10 −1.0000E+01 −5.4578E−02  2.4540E−02 −1.1492E−02 5.2310E−04 2.5414E−03 k A14 A16 A18 A20 R1 −8.0560E−02  7.2859E−05 −6.5381E−06  0.0000E+00  0.0000E+00 R2  8.0341E+00  3.2626E−04 −3.2282E−05  0.0000E+00  0.0000E+00 R5 −3.7000E+01  1.8801E−02 −2.6319E−03  0.0000E+00  0.0000E+00 R6  1.1341E+00 −6.4772E−03  9.0632E−04  0.0000E+00  0.0000E+00 R7 −1.0000E+01 −4.9230E−02  1.3432E−02 −1.5112E−03  0.0000E+00 R8 −3.8471E+00 −3.5905E−03  8.3858E−04 0.0000E+00  0.0000E+00 R9  4.3210E+00  9.6697E−04 −1.1299E−04 5.4261E−06  0.0000E+00 R10 −1.0000E+01 −1.4982E−03  4.0864E−04 −5.6832E−05  3.2715E−06

Table 12 shows free-form surface data in the camera optical lens 40 according to Embodiment 4 of the present invention.

TABLE 12 Free-form surface coefficient k X⁴Y⁰ X²Y² X⁰Y⁴ X⁶Y⁰ X⁴Y² X²Y⁴ X⁰Y⁶ R3  9.5476E+00 −4.0547E−02 −8.1280E−02 −4.0716E−02  3.8485E−02  1.1561E−01  1.1615E−01  3.8660E−02 R4  4.9317E+00 −4.7167E−02 −9.4524E−02 −4.7325E−02  3.6305E−02  1.0976E−01  1.1008E−01  3.6487E−02 X⁴Y⁶ X²Y⁸ X⁰Y¹⁰ X¹²Y⁰ X¹⁰Y² X⁸Y⁴ X⁶Y⁶ X⁴Y⁸ R3 −2.7177E−01 −1.3602E−01 −2.7208E−02  2.2108E−02  1.3278E−01  3.3201E−01  4.4266E−01  3.3195E−01 R4 −2.1828E−01 −1.0873E−01 −2.2133E−02  1.9072E−02  1.1480E−01  2.8757E−01  3.8585E−01  2.8622E−01 X²Y¹² X⁰Y¹⁴ X¹⁶Y⁰ X¹⁴Y² X¹²Y⁴ X¹⁰Y⁶ X⁸Y⁸ X⁶Y¹⁰ R3 −6.3614E−02 −9.0843E−03  1.9697E−03  1.5664E−02  5.4740E−02  1.0957E−01  1.3683E−01  1.0958E−01 R4 −5.3883E−02 −7.5519E−03  1.2822E−03  1.0042E−02  3.6328E−02  7.1682E−02  9.0834E−02  7.2233E−02 X⁸Y¹⁰ X⁶Y¹² X⁴Y¹⁴ X²Y¹⁶ X⁰Y¹⁸ X²⁰Y⁰ X¹⁸Y² X¹⁶Y⁴ R3 −2.1968E−02 −1.4694E−02 −6.3094E−03 −1.5619E−03 −1.7556E−04  0.0000E+00  0.0000E+00  0.0000E+00 R4  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00 X⁸Y⁰ X⁶Y² X⁴Y⁴ X²Y⁶ X⁰Y⁸ X¹⁰Y⁰ X⁸Y² X⁶Y⁴ R3  4.4178E−03  1.8332E−02  2.6634E−02  1.7582E−02  4.4790E−03 −2.7073E−02 −1.3621E−01 −2.7198E−01 R4  1.5635E−03  5.8509E−03  7.6299E−03  5.2904E−03  1.7387E−03 −2.1717E−02 −1.0933E−01 −2.1686E−01 X²Y¹⁰ X⁰Y¹² X¹⁴Y⁰ X¹²Y² X¹⁰Y⁴ X⁸Y⁶ X⁶Y⁸ X⁴Y¹⁰ R3  1.3293E−01  2.2126E−02 −9.1150E−03 −6.3595E−02 −1.9085E−01 −3.1799E−01 −3.1816E−01 −1.9090E−01 R4  1.1486E−01  1.9185E−02 −7.6780E−03 −5.3324E−02 −1.6285E−01 −2.6973E−01 −2.7343E−01 −1.5794E−01 X⁴Y¹² X²Y¹⁴ X⁰Y¹⁶ X¹⁸Y⁰ X¹⁶Y² X¹⁴Y⁴ X¹²Y⁶ X¹⁰Y⁸ R3  5.4850E−02  1.5609E−02  1.9584E−03 −1.7642E−04 −1.5779E−03 −6.2766E−03 −1.4682E−02 −2.1998E−02 R4  3.4312E−02  1.0255E−02  1.2263E−03  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00 X¹⁴Y⁶ X¹²Y⁸ X¹⁰Y¹⁰ X⁸Y¹² X⁶Y¹⁴ X⁴Y¹⁶ X²Y¹⁸ X⁰Y²⁰ R3  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00 R4  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00

FIG. 8 illustrates a situation where an RMS spot diameter of the camera optical lens 40 according to Embodiment 4 is within a first quadrant. According to FIG. 8, it can be seen that the camera optical lens 40 according to Embodiment 4 can achieve good imaging quality.

The numerical values corresponding to the respective conditions in this embodiment are listed in Table 13. It can be seen that the imaging optical system according to this embodiment satisfies the above-mentioned conditions.

In this embodiment, an entrance pupil diameter ENPD of the camera optical lens 40 is 3.969 mm, the full field of view image height IH (in a diagonal direction) is 4.400 mm, the image height in an x direction is 3.520 mm, the image height in a y direction is 2.640 mm, and the imaging effect is the best in this rectangular area; the FOV in the diagonal direction is 27.43°, the FOV in the x direction is 22.21°, and the FOV in the y direction is 16.85°. The camera optical lens 40 satisfies the design requirements of a long focal length and ultra-thinness, its longitudinal and lateral color aberrations are sufficiently corrected, and the camera optical lens has excellent optical characteristics.

TABLE 13 Parameter and Embodiment Embodiment Embodiment Embodiment conditions 1 2 3 4 R7 6.10 6.09 55.56 53.61 R10 −18.07 −20.65 −43.27 −18.29 f 5.757 5.800 8.850 8.850 fl 2.931 2.944 3.468 3.457 f2 −3.041 −3.032 −4.357 −4.385 f3 6.724 6.762 7.660 6.763 f4 −18.167 −18.256 −5.153 −4.247 f5 −8.340 −8.625 −18.182 −41.145 FNO 2.40 2.40 2.23 2.23 TTL 5.707 5.753 7.810 7.810 IH 5.000 5.000 4.400 4.400 FOV 45.81° 45.61° 27.92° 27.43°

It should be understood by those skilled in the art that the above embodiments are merely some specific embodiments of the present invention, and various changes in form and details may be made without departing from the scope of the present invention. 

What is claimed is:
 1. A camera optical lens, comprising, from an object side to an image side: a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power; and a fifth lens, wherein at least one of the first lens to the fifth lens has a free-form surface, and the camera optical lens satisfies following conditions: 0≤R7; and R10≤0, where R7 denotes a central curvature radius of an object side surface of the fourth lens, and R10 denotes a central curvature radius of an image side surface of the fifth lens.
 2. The camera optical lens as described in claim 1, further satisfying a following condition: 0.50≤d4/d6≤25.00, where d4 denotes an on-axis distance form an image side surface of the second lens to an object side surface of the third lens, and d6 denotes an on-axis distance from an image side surface of the third lens to the object side surface of the fourth lens.
 3. The camera optical lens as described in claim 1, further satisfying following conditions: 0.20≤f1/f≤0.76; −1.47≤(R1+R2)/(R1−R2)≤−0.29; and 0.08≤d1/TTL≤0.35, where f denotes a focal length of the camera optical lens, f1 denotes a focal length of the first lens, R1 denotes a central curvature radius of an object side surface of the first lens, R2 denotes a central curvature radius of an image side surface of the first lens, d1 denotes an on-axis thickness of the first lens, and TTL denotes a total optical length from the object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
 4. The camera optical lens as described in claim 1, further satisfying following conditions: −1.06≤f2/f≤−0.33; 0.15≤(R3+R4)/(R3−R4)≤0.55; and 0.02≤d3/TTL≤0.06, where f denotes a focal length of the camera optical lens, f2 denotes a focal length of the second lens, R3 denotes a central curvature radius of an object side surface of the second lens, R4 denotes a central curvature radius of an image side surface of the second lens, d3 denotes an on-axis thickness of the second lens, and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
 5. The camera optical lens as described in claim 1, further satisfying following conditions: 0.38≤f3/f≤1.75; −0.68≤(R5+R6)/(R5−R6)≤1.42; and 0.03≤d5/TTL≤0.13, where f denotes a focal length of the camera optical lens, f3 denotes a focal length of the third lens, R5 denotes a central curvature radius of an object side surface of the third lens, R6 denotes a central curvature radius of an image side surface of the third lens, d5 denotes an on-axis thickness of the third lens, and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
 6. The camera optical lens as described in claim 1, further satisfying following conditions: −6.31≤f4/f≤−0.32; 0.54≤(R7+R8)/(R7−R8)≤6.15; and 0.02≤d7/TTL≤0.10, where f denotes a focal length of the camera optical lens, f4 denotes a focal length of the fourth lens, R8 denotes a central curvature radius of an image side surface of the fourth lens, d7 denotes an on-axis thickness of the fourth lens, and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
 7. The camera optical lens as described in claim 1, further satisfying following conditions: −9.30≤f5/f≤−0.97; −6.69≤(R9+R10)/(R9−R10)≤−0.97; and 0.04≤d9/TTL≤0.15, where f denotes a focal length of the camera optical lens, f5 denotes a focal length of the fifth lens, R9 denotes a central curvature radius of an object side surface of the fifth lens, d9 denotes an on-axis thickness of the fifth lens, and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
 8. The camera optical lens as described in claim 1, further satisfying a following condition: f/TTL≥1.00, where f denotes a focal length of the camera optical lens, and TTL denotes a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis.
 9. The camera optical lens as described in claim 1, wherein a total optical length from an object side surface of the first lens to an image plane of the camera optical lens along an optic axis is smaller than or equal to 8.59 mm.
 10. The camera optical lens as described in claim 1, wherein an F number of the camera optical lens is smaller than or equal to 2.47. 